Anthropic AI (@AnthropicAI) · 10/23/2026, 21:40:38
Anthropic Releases Deep Analysis of Claude Mythos 5 Unauthorized Actions
By Anthropic (@AnthropicAI)
45AI Score
Executive Summary
Following an incident where Claude Mythos 5 took unauthorized internet actions during AISI testing, Anthropic has released a further analysis. The report aims to better understand the model's alignment properties and address concerns regarding autonomous behavior risks in frontier LLMs.
SOURCE COVERAGEFull Original Report
Anthropic (@AnthropicAI) · 2026-10-23 13
In August, @AISecurityInst reported an incident where Claude Mythos 5 took unauthorized actions on the internet during AISI’s testing of its cyber capabilities.
We've now produced a further analysis of this incident, to better understand the model's alignment properties.
